With a dominant performance at the Irish Open, Jon Rahm now has the second-best British Open betting odds. Rahm is listed at 12/1, the same odds given to Jordan Spieth by Westgate Las Vegas Superbook. That's a lot of respect for a 22-year-old who will make just his second start at the Open next week at Royal Birkdale.
Rahm finished T-59 in his tournament debut at Royal Troon last year. Dustin Johnson remains the tournament favorite at 10-to-1 odds.
Four-time major champ Rory McIlroy, reigning Masters champ Sergio Garcia and Rickie Fowler have the next-best odds (15/1), followed by a group at 20/1 that includes former World No. 1 Jason Day, defending champ Henrik Stenson, and current World No. 2 Hideki Matsuyama.
Also listed at 20/1 are a pair of players with connections to Royal Birkdale. Justin Rose finished T-4 at the venue in 1998 when he was a 17-year-old amateur. And red-hot Tommy Fleetwood, who won the French Open last week, grew up just down the road from the Southport course.
Recent U.S. Open winner Brooks Koepka fell to 30/1. Koepka decided to not play any events between the two majors. He's joined at 30/1 by Adam Scott, who had three consecutive top 5s at the Open from 2012 to 2014.
Phil Mickelson, who finished T-20 at the Greenbrier Classic in his first event since parting ways with longtime caddy Jim "Bones" Mackay, is currently 40/1. The five-time major champ's last win anywhere came at the 2013 Open at Muirfield.